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authorPali Rohár <pali.rohar@gmail.com>2015-03-08 13:01:01 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2015-05-15 09:57:43 +0300
commit604c31039dae4653f33003d08c91ef58b70b5e63 (patch)
treee5621a2bae539aac9c5f413a5423749f13ceb41c /drivers/crypto/omap-sham.c
parentca7fc7e962fa067ba31f76a6e5828537394f6481 (diff)
downloadlinux-604c31039dae4653f33003d08c91ef58b70b5e63.tar.xz
crypto: omap-sham - Check for return value from pm_runtime_get_sync
Function pm_runtime_get_sync could fail and we need to check return value to prevent kernel crash. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/omap-sham.c')
-rw-r--r--drivers/crypto/omap-sham.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 4d63e0d4da9a..a6703204fd86 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -362,7 +362,13 @@ static void omap_sham_copy_ready_hash(struct ahash_request *req)
static int omap_sham_hw_init(struct omap_sham_dev *dd)
{
- pm_runtime_get_sync(dd->dev);
+ int err;
+
+ err = pm_runtime_get_sync(dd->dev);
+ if (err < 0) {
+ dev_err(dd->dev, "failed to get sync: %d\n", err);
+ return err;
+ }
if (!test_bit(FLAGS_INIT, &dd->flags)) {
set_bit(FLAGS_INIT, &dd->flags);
@@ -1947,7 +1953,13 @@ static int omap_sham_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_irq_safe(dev);
- pm_runtime_get_sync(dev);
+
+ err = pm_runtime_get_sync(dev);
+ if (err < 0) {
+ dev_err(dev, "failed to get sync: %d\n", err);
+ goto err_pm;
+ }
+
rev = omap_sham_read(dd, SHA_REG_REV(dd));
pm_runtime_put_sync(&pdev->dev);
@@ -1977,6 +1989,7 @@ err_algs:
for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
crypto_unregister_ahash(
&dd->pdata->algs_info[i].algs_list[j]);
+err_pm:
pm_runtime_disable(dev);
if (dd->dma_lch)
dma_release_channel(dd->dma_lch);
@@ -2019,7 +2032,11 @@ static int omap_sham_suspend(struct device *dev)
static int omap_sham_resume(struct device *dev)
{
- pm_runtime_get_sync(dev);
+ int err = pm_runtime_get_sync(dev);
+ if (err < 0) {
+ dev_err(dev, "failed to get sync: %d\n", err);
+ return err;
+ }
return 0;
}
#endif